The timing is particularly bad considering the city’s current heat wave, where temperatures climbed into the 90s this week.

The institution issued the following statement on social media channels and via email:

Because of an air-conditioning outage, the Brooklyn Museum will be closed tomorrow, Friday, July 8 through Sunday, July 10. Our team is working around the clock to replace the damaged systems during this time. All museum collections are being constantly monitored and sensitive materials are being moved to climate controlled spaces.

A spokeswoman told the New York Timesthat “transformer malfunctioned and destroyed cables” connected to the air conditioning equipment. A $63 million renovation completed in 2004 installed air conditioning throughout much of the building.